* {
    margin: 0px;
    padding: 0px;
}

a {
    text-decoration: none;
    color: black;
}

li {
    list-style: none;
}

body {
    background-color: rgb(240, 242, 245);
    /* font-size: 15px; */
}

.heart {
    width: 100%;
    margin: 0 auto;
    background-color: rgb(240, 242, 245);
}


/* .sidebar,
.linkDisplay {
    float: left;
} */

.sidebar {
    position: fixed;
    height: 100%;
    width: 18%;
    left: 0px;
    overflow-y: auto;
    background-color: rgb(0, 21, 41);
}

.sidebar ul li {
    float: none;
    height: 50px;
    border-top: 0;
    border-left: 0;
    border-right: 0;
    border-bottom: 1px;
    border-style: solid;
    text-align: center;
    line-height: 50px;
}

.sidebar ul li a {
    color: rgb(166, 173, 180);
}

.sidebar ul li a:hover {
    color: rgb(255, 255, 255);
}

.linkDisplay {
    /* width: 100%; */
    /* height: 50px; */
    margin-left: 150px;
}

.head {
    display: block;
    width: 100%;
    height: 48px;
    background-color: rgb(255, 255, 255);
}

.head>a {
    padding-left: 8%;
    line-height: 48px;
    color: rgb(24, 144, 255);
}

.content {
    display: none;
    width: 92%;
    margin-left: 8%;
}

.content a {
    display: block;
    float: left;
    margin: 2%;
    width: 26%;
    height: 50px;
    background-color: rgb(255, 255, 255);
    text-align: center;
    line-height: 50px;
}

.content a:hover {
    color: rgb(24, 144, 255);
}

.foot {
    position: fixed;
    height: 8%;
    width: 100%;
    bottom: 0;
    /* background-color: rosybrown; */
}


/* ========================================================================================== */

@media screen and (max-width:500px) {
    .sidebar {
        position: fixed;
        height: 100%;
        width: 150px;
        left: 0px;
        overflow-y: auto;
        background-color: rgb(0, 21, 41);
    }
    .sidebar ul li {
        float: none;
        height: 50px;
        border-top: 0;
        border-left: 0;
        border-right: 0;
        border-bottom: 1px;
        border-style: solid;
        text-align: center;
        line-height: 50px;
    }
    .sidebar ul li a {
        color: rgb(166, 173, 180);
    }
    .sidebar ul li a:hover {
        color: rgb(255, 255, 255);
    }
    .linkDisplay {
        /* width: 100%; */
        /* height: 50px; */
        margin-left: 150px;
    }
    .head {
        display: block;
        width: 100%;
        height: 48px;
        background-color: rgb(255, 255, 255);
    }
    .head>a {
        padding-left: 4%;
        line-height: 48px;
        color: rgb(24, 144, 255);
    }
    .content {
        display: none;
        width: 92%;
        margin-left: 8%;
    }
    .content a {
        display: block;
        float: left;
        margin: 2%;
        width: 90%;
        height: 50px;
        background-color: rgb(255, 255, 255);
        text-align: center;
        line-height: 50px;
    }
    .content a:hover {
        color: rgb(24, 144, 255);
    }
    .search {
        display: none;
    }
    .foot {
        position: fixed;
        height: 8%;
        width: 100%;
        bottom: 0;
        /* background-color: rosybrown; */
    }
}